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MAGNETIC SENSING DEVICE AND ELECTRONIC COMPASS USING THE SAME

  • US 20090009163A1
  • Filed: 09/05/2008
  • Published: 01/08/2009
  • Est. Priority Date: 03/06/2006
  • Status: Abandoned Application
First Claim
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1. A magnetic sensing device comprising:

  • a magnetic sensor for detecting magnetism;

    bias-magnetic-field generating means for applying bias magnetic fields having opposite polarities to each other to the magnetic sensor;

    detecting means for detecting output voltages that are obtained in response to the bias magnetic fields having the corresponding polarities;

    calculating means for determining a difference between the output voltages that are obtained in response to the bias magnetic fields having the corresponding polarities; and

    control means for controlling the bias-magnetic-field generating means so that the difference becomes substantially zero.

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